<template>
  <el-color-picker
    class="theme-picker"
    popper-class="theme-picker-dropdown"
    v-model="theme"></el-color-picker>
</template>

<script>
// const version = require('element-ui/package.json').version // element-ui version from node_modules
const ORIGINAL_THEME = '#409EFF' // default color
import { addOrUpdate } from '@/api/skin'
import SKIN from '@/skin/skin'
export default {
  data() {
    return {
      listQuery: {
        platformId: this.$store.state.user.platformId,
        userId: this.$store.state.user.userId,
        skinStyle: ''
      },
      chalk: '', // content of theme-chalk css
      theme: ORIGINAL_THEME,
      THEME_NEW: SKIN.CUSTOM1
    }
  },
  watch: {
    theme(val, oldVal) {
      console.log('=======theme========')
      console.log(val)
      var css = ''
      if (val !== null) {
        const cssTemp = this.THEME_NEW.replace(/ABC/g, val)
        const cssTemp1 = cssTemp.replace(
          /ITEM/g,
          this.shade(val.replace('#', ''), 0.5)
        )
        css = cssTemp1.replace(
          /SELECT/g,
          this.shade(val.replace('#', ''), 0.3)
        )
        console.log(css)
      } else {
        css = SKIN.DEFAULT
      }
      const id = 'chalk'
      var styleTag = document.getElementById(id)
      if (!styleTag) {
        styleTag = document
          .createElement('style')
          .setAttribute('id', id)
          .head.appendChild(styleTag)
      }
      styleTag.innerText = css
      localStorage.setItem('savedstyle', css)
      this.listQuery.skinStyle = css
      this.updateSkin()
      // if (typeof val !== 'string') return
      // const themeCluster = this.getThemeCluster(val.replace('#', ''))
      // const originalCluster = this.getThemeCluster(oldVal.replace('#', ''))
      // console.log(themeCluster, originalCluster)
      // const getHandler = (variable, id) => {
      //   return () => {
      //     const originalCluster = this.getThemeCluster(ORIGINAL_THEME.replace('#', ''))
      //     const newStyle = this.updateStyle(this[variable], originalCluster, themeCluster)

      //     let styleTag = document.getElementById(id)
      //     if (!styleTag) {
      //       styleTag = document.createElement('style')
      //       styleTag.setAttribute('id', id)
      //       document.head.appendChild(styleTag)
      //     }
      //     styleTag.innerText = newStyle
      //   }
      // }

      // const chalkHandler = getHandler('chalk', 'chalk-style')

      // if (!this.chalk) {
      //   const url = `https://unpkg.com/element-ui@${version}/lib/theme-chalk/index.css`
      //   this.getCSSString(url, chalkHandler, 'chalk')
      // } else {
      //   chalkHandler()
      // }

      // const styles = [].slice.call(document.querySelectorAll('style'))
      //   .filter(style => {
      //     const text = style.innerText
      //     return new RegExp(oldVal, 'i').test(text) && !/Chalk Variables/.test(text)
      //   })
      // styles.forEach(style => {
      //   const { innerText } = style
      //   if (typeof innerText !== 'string') return
      //   style.innerText = this.updateStyle(innerText, originalCluster, themeCluster)
      // })
      // this.$message({
      //   message: '换肤成功',
      //   type: 'success'
      // })
    }
  },

  methods: {
    updateSkin: function() {
      addOrUpdate(this.listQuery).then(response => {
        if (response.code === '0000') {
          this.$notify({
            title: '成功',
            message: '保存成功',
            type: 'success',
            duration: 2000
          })
        } else {
          this.$notify({
            title: '失败',
            message: '保存失败',
            type: 'erorr',
            duration: 2000
          })
        }
      })
    },
    updateStyle(style, oldCluster, newCluster) {
      let newStyle = style
      oldCluster.forEach((color, index) => {
        newStyle = newStyle.replace(new RegExp(color, 'ig'), newCluster[index])
      })
      return newStyle
    },

    getCSSString(url, callback, variable) {
      const xhr = new XMLHttpRequest()
      xhr.onreadystatechange = () => {
        if (xhr.readyState === 4 && xhr.status === 200) {
          this[variable] = xhr.responseText.replace(/@font-face{[^}]+}/, '')
          callback()
        }
      }
      xhr.open('GET', url)
      xhr.send()
    },

    getThemeCluster(theme) {
      const tintColor = (color, tint) => {
        let red = parseInt(color.slice(0, 2), 16)
        let green = parseInt(color.slice(2, 4), 16)
        let blue = parseInt(color.slice(4, 6), 16)

        if (tint === 0) {
          // when primary color is in its rgb space
          return [red, green, blue].join(',')
        } else {
          red += Math.round(tint * (255 - red))
          green += Math.round(tint * (255 - green))
          blue += Math.round(tint * (255 - blue))

          red = red.toString(16)
          green = green.toString(16)
          blue = blue.toString(16)

          return `#${red}${green}${blue}`
        }
      }

      const shadeColor = (color, shade) => {
        let red = parseInt(color.slice(0, 2), 16)
        let green = parseInt(color.slice(2, 4), 16)
        let blue = parseInt(color.slice(4, 6), 16)

        red = Math.round((1 - shade) * red)
        green = Math.round((1 - shade) * green)
        blue = Math.round((1 - shade) * blue)

        red = red.toString(16)
        green = green.toString(16)
        blue = blue.toString(16)

        return `#${red}${green}${blue}`
      }

      const clusters = [theme]
      for (let i = 0; i <= 9; i++) {
        clusters.push(tintColor(theme, Number((i / 10).toFixed(2))))
      }
      clusters.push(shadeColor(theme, 0.1))
      return clusters
    },
    shade: function(color, shade) {
      let red = parseInt(color.slice(0, 2), 16)
      let green = parseInt(color.slice(2, 4), 16)
      let blue = parseInt(color.slice(4, 6), 16)
      console.log(red + '---' + green + '---' + blue)
      red = Math.round((1 - shade) * red)
      green = Math.round((1 - shade) * green)
      blue = Math.round((1 - shade) * blue)
      console.log(red + '---' + green + '---' + blue)
      red = red.toString(16)
      green = green.toString(16)
      blue = blue.toString(16)
      if (red.length === 1) {
        red = '0' + red
      }
      if (green.length === 1) {
        green = '0' + green
      }
      if (blue.length === 1) {
        blue = '0' + blue
      }
      console.log(red + '---' + green + '---' + blue)
      return `#${red}${green}${blue}`
    }
  }
}
</script>

<style>
.theme-picker .el-color-picker__trigger {
  vertical-align: middle;
}

.theme-picker-dropdown .el-color-dropdown__link-btn {
  /* display: none; */
}
</style>
